Tire.



S. SGOGNAMILLO.

TIRE.

APPLICATION FILED SBPT.25,1911.

v 1,0 ,921 Patented May 13, 1913.

2 SHEETS-SHEET 1.

S. SGOGNAMILLO.

TIRE.

APPLIOATION FILED SEPT.26,1911.

1,06 1,927. Patented May 13,1913.

2 BHEET3-BHEBT 2.

flat or horizontally disposed base members 12 provide for a clearance Within the casing so that the said outer spring 11 may be forced inwardly a considerable distance or under excessive compression Without engaging the inner fastening means for the clenchcrs, which in the present instance consists of the inner spring 14. The inner spring 14 coacts With the outer spring 11 in maintaining the casing 9 in proper distended condition at the base of the casing or adjacent, to the wheel rim. The inner attached portions or clenchers 8 of the casing or outer tube 9 are engaged and expanded by the inner spring 14 similar in contour to the spring 11 but reversed as to the disposition of the curved and horizontally straight members 15 and 16. The horizontally straight members 16 of the spring 14 are slightly separated and the curved members 15 are in cont-act, the curved members becoming the base of the spring and exerting a strong pressure of a yielding character on the portions of the tire secured to the rim to reliably hold the latter when the tire is applied to'the rim. 'It Will be seen that the spring 14 engages the casing 9 at opposite points near the juncture of the opposite parts of the casing with the clenchers and that a considerable portion of the said spring 14, including the flat side thereof made up of the horizontal members 16 projects into the space inclosed by the said casing, and when compression is exerted on the tire;at, the point of engagement of the latter with the ground surface, the said spring 14 itightens relatively to the parts of the casing engaged thereby and the horizontal' nien' bers 16 are closed, and therefore the two springs Hand .14 coact in maintain ing the shape of the casing 9. Under excessive pressure the two adjacent fiat sides of thesprings 11 and 14 are apt to come into engagement, and under such conditions the the convolutions of th: two springs Will be closed and the said springs will conjointly sustain the tire and the load with cushioning effect, as each spring Will then bodily cushion the other and a strong reinforce will result in View of the combined strength of the tWo springs under these conditions and a breakdown of the tire under excessive compression willbe obviated. It will therefore be seen that it is intended that the base of each spring 11 and 14 is contracted or has the members thereof continually in contact to set up a sufiicient re sistance. to the movement of the remaining portions of the convolutionsof each spring to insure the performance of the functions desired and to. give to the tire the requisite stability. Each of the springs 11 and 14 is tightly introduced in the outer casing or tube 9 and is frictionally held inth'e latter,

therebeing ample space bet-ween the op posing portions of the two springs within the casing or tube 9 'to compensate for maximum compressive movements.

Any suitable means may be used for introducing the springs in the outer casing or tube, and the proportions of the springs may be varied in accordance with the size of the tire.

What is claimed is:

A tire comprising an inclosing casing having an outer tread portion, and two continuous coiled springs inserted through the casing and both semicircular in cross section and respectively engaging by frictional contact the inner surfaces of the tread and rim attaching portions of the casing, the

' outer tread engaging spring having an inner fiat side with the convolutions normally in close contact and the outer curved portions of the convolution's normally open and out of contact, and the spring engaging the rim attaching portion of the tire having the lower curved portionsof the convolutions normally closed and the outer fiat portions of the convolutions normally open to hold the casing in positive shape and provide a resilient cushion for said casing, the two adjacent fiat sides of the springs providing a clearance for all moderate compressions of the casing and forming stop surfaces when the casing is subjected to maximum compression.

In testimony whereof I have hereunto set my hand in presence of two subscribing nesses. v

SALVATORE SCOGNAh ULLO. "Witnesses CHAS. S. HYER, F. B. Hansen. 

